Abstract: An accessory for an external side view mirror unit which has a frame for rigidly securing the accessory to the side view mirror unit. An upstanding handlebar extends from the frame to allow the driver of an automobile, truck, or similar motor vehicle to extend his or her arm from the motor vehicle and grasp the handlebar, thus acknowledging to passing motorcyclists that the driver of the motor vehicle is a fellow cyclist.

Abstract: An accessory for an external side view mirror unit which has a frame for rigidly securing the accessory to the side view mirror unit. An upstanding handlebar extends from the frame to allow the driver of an automobile, truck, or similar motor vehicle to extend his or her arm from the motor vehicle and grasp the handlebar, thus acknowledging to passing motorcyclists that the driver of the motor vehicle is a fellow cyclist.

Abstract: Modular digital exchange terminals linked in a network by earth satellite provide coordinated multiplex switching and activity compression between line circuits and satellite time division channels. The line circuits carry digital data and digitalized voice telephone information into and out of the network. Nodal access modules (NAU's) interface to the satellite radio equipment. Branch exchange modules (NCU's) link line circuits switchably to a nodal access module through time division channels of subsidiary digital communication links. In transit up-link (to satellite time division channels) information is switched between lines and NCU buffer stores (virtual channels), selectively assigned by activity compression to time channels on associated digital links (each link accommodating only a fraction of the virtual traffic capacity of the associated stores), and transmitted to the NAU.